# Routing problem, I think

**URL:** <https://www.ruby-forum.com/t/routing-problem-i-think/184512>\
**Category:** Rails\
**Created:** [March 3, 2010, 6:24pm UTC](https://www.ruby-forum.com/t/routing-problem-i-think/184512 "2010-03-03T18:24:24Z")\
**Posts on this page:** 8\
**Page:** 1

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**Author:** ![RichardOnRails](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/r/e0b2c6/32.png) [@RichardOnRails](https://www.ruby-forum.com/u/RichardOnRails)\
**Post date:** [March 3, 2010, 6:24pm UTC](https://www.ruby-forum.com/t/routing-problem-i-think/184512/1 "2010-03-03T18:24:24Z")

</div>

I’ve got a Rails app that brings up a Home page, which includes a  
Vendor link. Clicking on that link I get  
===========Web page start ========  
NameError in VendorController#index  
uninitialized constant VendorController  
RAILS\_ROOT: K:/\_Projects/Ruby/\_Rails\_Apps/\_EIMS/RTS  
Application Trace | Framework Trace | Full Trace  
Request  
Parameters:  
None  
Show session dump  
Response  
Headers:  
{“Content-Type”=\>“”,  
“Cache-Control”=\>“no-cache”}  
===========Web page end ========  
I start up with [http://localhost:3000](http://localhost:3000), which references config  
\routes.rb that contains (sans comments):  
ActionController::Routing::Routes.draw do |map|  
map.resources :vendor  
map.root :controller =\> “home”, :action =\> “index”  
map.connect ‘:controller/:action/:id’  
map.connect ‘:controller/:action/:id.:format’  
end

That combination brings up a webpage that includes a link named  
Vendor, which is generated by the collective effect of:  
• app\controllers\ app\controllers  
class HomeController \< ApplicationController  
layout ‘standard’  
def list  
end  
end  
• app\views\home\ index.html.erb

\<%= link\_to ‘Vendor’, :controller=\>‘vendor’, :action=\>‘index’ %\>  
&nbsp;

My machine is configured with:  
Rails 2.3.5  
Ruby 1.8.6  
WinXP-Pro/SP3  
Firefox 3.6  
MySQL 5.0.37-community-nt  
Mongrel

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<div class="post-metadata">

**Author:** ![RichardOnRails](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/r/e0b2c6/32.png) [@RichardOnRails](https://www.ruby-forum.com/u/RichardOnRails)\
**Post date:** [March 3, 2010, 7:11pm UTC](https://www.ruby-forum.com/t/routing-problem-i-think/184512/2 "2010-03-03T19:11:50Z")

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On Mar 3, 5:23 pm, RichardOnRails  
[removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) wrote:

> I’ve got a Rails app that brings up a Home page, which includes a  
> Vendor link. Clicking on that link I get  
> ===========Web page start ========  
> NameError in VendorController#index  
> uninitialized constant VendorController

What’s in vendor\_controller.rb ?

Fred

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**Author:** ![RichardOnRails](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/r/e0b2c6/32.png) [@RichardOnRails](https://www.ruby-forum.com/u/RichardOnRails)\
**Post date:** [March 3, 2010, 8:25pm UTC](https://www.ruby-forum.com/t/routing-problem-i-think/184512/3 "2010-03-03T20:25:37Z")

</div>

I think it is looking for vendors\_controller.rb

The controller is always the plural of the model, unless specified.

Renaming your vendor\_controller.rb file to vendors\_controller.rb should  
work.

Punit

RichardOnRails wrote:

> I�ve got a Rails app that brings up a Home page, which includes a  
> Vendor link. Clicking on that link I get  
> ===========Web page start ========  
> NameError in VendorController#index  
> uninitialized constant VendorController  
> RAILS\_ROOT: K:/\_Projects/Ruby/\_Rails\_Apps/\_EIMS/RTS  
> Application Trace | Framework Trace | Full Trace  
> Request  
> Parameters:  
> None  
> Show session dump

---

<div class="post-metadata">

**Author:** ![RichardOnRails](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/r/e0b2c6/32.png) [@RichardOnRails](https://www.ruby-forum.com/u/RichardOnRails)\
**Post date:** [March 3, 2010, 8:31pm UTC](https://www.ruby-forum.com/t/routing-problem-i-think/184512/4 "2010-03-03T20:31:27Z")

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Hi Frederick,

Thanks for looking into my problem. I trying hard to come up to speed  
on Rails. I think my Ruby’s now adequate.

Best wishes,  
Richard

> What’s in vendor\_controller.rb ?

# \app\controllers\vendors\_controller.rb

class VendorsController \< ApplicationController

# GET /vendors

# GET /vendors.xml

def index  
@vendors = Vendor.all

```
respond_to do |format|
  format.html # index.html.erb
  format.xml { render :xml => @vendors }
end

```

end

# GET /vendors/1

# GET /vendors/1.xml

def show  
@vendor = Vendor.find(params[:id])

```
respond_to do |format|
  format.html # show.html.erb
  format.xml { render :xml => @vendor }
end

```

end

# GET /vendors/new

# GET /vendors/new.xml

def new  
@vendor = Vendor.new

```
respond_to do |format|
  format.html # new.html.erb
  format.xml { render :xml => @vendor }
end

```

end

# GET /vendors/1/edit

def edit  
@vendor = Vendor.find(params[:id])  
end

# POST /vendors

# POST /vendors.xml

def create  
@vendor = Vendor.new(params[:vendor])

```
respond_to do |format|
  if @vendor.save
    flash[:notice] = 'Vendor was successfully created.'
    format.html { redirect_to(@vendor) }
    format.xml { render :xml => @vendor, :status

```

=\> :created, :location =\> @vendor }  
else  
format.html { render :action =\> “new” }  
format.xml { render :xml =\> @vendor.errors, :status  
=\> :unprocessable\_entity }  
end  
end  
end

# PUT /vendors/1

# PUT /vendors/1.xml

def update  
@vendor = Vendor.find(params[:id])

```
respond_to do |format|
  if @vendor.update_attributes(params[:vendor])
    flash[:notice] = 'Vendor was successfully updated.'
    format.html { redirect_to(@vendor) }
    format.xml { head :ok }
  else
    format.html { render :action => "edit" }
    format.xml { render :xml => @vendor.errors, :status

```

=\> :unprocessable\_entity }  
end  
end  
end

# DELETE /vendors/1

# DELETE /vendors/1.xml

def destroy  
@vendor = Vendor.find(params[:id])  
@vendor.destroy

```
respond_to do |format|
  format.html { redirect_to(vendors_url) }
  format.xml { head :ok }
end

```

end  
end

On Mar 3, 1:10 pm, Frederick C. [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid)

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**Author:** ![RichardOnRails](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/r/e0b2c6/32.png) [@RichardOnRails](https://www.ruby-forum.com/u/RichardOnRails)\
**Post date:** [March 3, 2010, 10:58pm UTC](https://www.ruby-forum.com/t/routing-problem-i-think/184512/5 "2010-03-03T22:58:59Z")

</div>

On 3 March 2010 21:26, RichardOnRails  
[removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) wrote:

> Hi All,
> 
> I got the links working. I was just puttering around and all of a  
> sudden I got them working. If I can figure out what’s different now  
> compared to my failing version, I’ll report back.
> 
> I’m not confident I’ll be able to tell because I just keep hacking  
> until I get something working. II haven’t taken the time to get  
> subversion, etc., working.

Do it now, it will save time in the long run. It is difficult to  
learn if you are not sure what you did to fix something. Most seem to  
be using git now, it is my personal choice. It is trivially easy to  
start a repository even when just playing with a new idea.

Colin

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**Author:** ![RichardOnRails](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/r/e0b2c6/32.png) [@RichardOnRails](https://www.ruby-forum.com/u/RichardOnRails)\
**Post date:** [March 3, 2010, 10:27pm UTC](https://www.ruby-forum.com/t/routing-problem-i-think/184512/6 "2010-03-03T22:27:57Z")

</div>

Hi All,

I got the links working. I was just puttering around and all of a  
sudden I got them working. If I can figure out what’s different now  
compared to my failing version, I’ll report back.

I’m not confident I’ll be able to tell because I just keep hacking  
until I get something working. II haven’t taken the time to get  
subversion, etc., working.

Best wishes,  
Richard

On Mar 3, 12:23 pm, RichardOnRails

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**Author:** ![RichardOnRails](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/r/e0b2c6/32.png) [@RichardOnRails](https://www.ruby-forum.com/u/RichardOnRails)\
**Post date:** [March 8, 2010, 9:24pm UTC](https://www.ruby-forum.com/t/routing-problem-i-think/184512/7 "2010-03-08T21:24:39Z")

</div>

RichardOnRails wrote:

> Hi Colin,
> 
> Thanks for the encouragement. I swear I’ll start employing subversion  
> after I meet my two-week deadline on the first phase of the project  
> I’m on.
> 
> Best wishes,  
> Richard  
> You’re kidding, right? Git in particular is very quick to set up. Do  
> it _now_ and you’ll be better able to meet your deadline. There is no  
> excuse at all for not using version control at all times.

---

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**Author:** ![RichardOnRails](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/r/e0b2c6/32.png) [@RichardOnRails](https://www.ruby-forum.com/u/RichardOnRails)\
**Post date:** [March 8, 2010, 6:10pm UTC](https://www.ruby-forum.com/t/routing-problem-i-think/184512/8 "2010-03-08T18:10:33Z")

</div>

Hi Colin,

Thanks for the encouragement. I swear I’ll start employing subversion  
after I meet my two-week deadline on the first phase of the project  
I’m on.

Best wishes,  
Richard